James watson



J. WATSON.

Milling Mmhine. l No. 98,821. Patented Jan.. l1, 1.870.`

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JAMES WATSON, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 98,821, dated VJanuary 11,1870.

IMPROVED MILLING-MACHINE.

f The Schedulereferred to :in these Letters Patent and making part ofthe same.

scribed hereafter, which, although `adapted to a great.

variety of work, is especially intended for cutting the key-seats andfeather-ways of shafts; a principal advantage ofthe machine being thatit performs itsduty v,completely nand efectually, without requiring atedious readjustm'ent or transferring of the work from one machine toanotheiyas heretofore.

In order to enable others, familiar with machinery of this. class, tomake and use my invention, I will now proceed to describe itsconstruct-ion and operation, reference being had to the accompanyingdrawing, which forms va part of this specification, andin which- YFigure l is a front view of my improved millingmachine;

Figure 2, a transverse sectional view of the same, on the line 1-2, iig.1;

Figure 3, a plan view;

Figures 4, 5, and 6, detached views of portions of the machine; and

Figure 7, a view of a modification.

Similar" letters refer to similar parts throughout the several views.

A represents the bed-plate vof the machine, upon which are formedguides, c a, for the sliding plate B, to which the work is secured; andat one end vof the said bed-plate is a pedestal or bracket, C, insuitable bearings'ou which, turns the driving-shaft D, furnished with 'acone-pulley, b, and with atoothed pinion, c, the latter, through themedium of a cog-wheel, 1,communicating motion to a pinion, f, ot aspindle, H, which turns in suitable bearings ou a movablehead, I.

The latter is arranged to slide vertically upon guides g g, formed uponthe bracket C, andis adj usted to any required position by means of ascrew, h, operating iu a manner which will be readily understood bythose familiar with machinery of this class.

The driving-shaft D being stationary, and the spindle H capable of avertical adjustment, it is necessary that the cog-wheel 4d should be soarranged as to always remain in gear with the pinious c and f.

This is eiected by means of two arms, o' and i', (fig. 5,) hung to theshaft D and spindle H, and the outer ends of which are connectedtogether by, and serve to support the spindle of the cog-wheel d.

When the spindle H is raised or lowered upon the vertical line x x, thearmsi and t will adjust themselves accordingly, (sce dotted lines y y,)in such a manner as to retain their cog-wheel in gear with the piuions candf.

The spindle H turns in a sleeve, j, (lig. 2,) which is itselt1 arrangedto turn in a bearing of the head I, and to the front end of which issecured a flat disk, J, the latterbeing iu contact with the front of thehead I, and having T-headed bolts, It R, adapted to a curved slot, l, ofthe said head, for the purpose of securing the disk in any position towhich it may be adjusted. Y

' 'Ihe adjustable diskJ is furnished with a drill, m, and at a pointdirectly opposite to this drill, with a rotarycutter, n., the spindle p,of the latter, turning in a tubular projection, p, of the disk, andhaving, at its rear end, a cog-wheel, q, gearing into the pinion f, thecog-wheel revolving around this pinion when the disk is adjusted, butvalways remaining in gear with the same. (See figs. 2 and 5.)

rlhespindle. t', oi' the drill m., turns in a tubular projection orbracket, s, of the disk J, receives its motion from the spindle Hthrough the bevel-gear s', and is adjusted toward or from the work by ascrew, t, in the usual manner. l

The anti-friction-mctal box a, (ligs. 2 and 6,) which is set into thebearings s, for the reception of the drillspindle, is tightened againstthelatter, as it wears, by means of blocks, o c, against which bear theends of set-screws w w, this plan enabling the box to be used for a muchlonger time than usual, without permitting the spindle to work loose.

It has been usual, heretofore, in cutting A-the keyseats andfeather-ways of shafts, to employ both a drill and a circula-rmilling-tool, similar to those shown in the drawing, the groove beingfirst cut by the milling-tool, after which the shaft is removed to adii'e'rent machine, in order to square up the ends of the said groove bymeans of a drill. This removing ofthe shaft from one machine to another,and the time requirechin its readjustment, render the work, especiallyfor heavy sliafting, both tedious and expensive, so much so, that whenthe key-seat or feather-way is of but moderate lengtlnit is foundpreferable to perform the whole operation by means of the drill alone.

The object of my present invention is, by combining the drill andmilling-tool in one machine, to render the shifting or readj ustinent ofthe work unnecessary. l

Its operation is as follows:

Ihe shaft X, in which the key-seat is to be cnt, is properly securedupon the adjustable plate B, the disk J heilig then turned to theposition shownin fig. l,

and secured to the head I, by means oi' the bolt k.

Motion is then communicated to the driving-shaft, and transmitted,through the gearing described, tothe drill m, the latter being thenlowered, by means of its screw t, util a hole of' the depth of thekey-seat has been out in' the shaft. The plate B, and shaft, are next soadjust-ed, that at the second descent of the drill, aAhole shall be cutat a point coinciding with the opposite end ofthe key-seat.

After this the bolts It are loosened, and the disk J is, withoutstopping the motion of the machine, turned half way'around, or to theposition shown in fig. 4, the disk being then secured as before, anddepressed by a proper operation of the screw 7l, until the `milling-tool n cuts into the shaft to the proper depth of the key-seat.

All that now remains to be done is to move the plate B, and shaft,longitudinally until the cutting of the groove is complete, thedrill-holes rst made forming the ends of the saine, as clearly shown iniig. 4.,

lIhe above machine, although intended especially for cutting key-seatsand feather-ways, is, it will `be' evident, adapted for the performanceof a great variety of work, and in order to increase its usefulness, aportion ofthe bracket C may, if desired, be made adjustable, as shown infig. 7, so as to enable the cutting to be performed at any angle. A

Iam aware that a revolving disk, carrying a series of radial drills, anyone of which may be employed by adjusting the disk, has been used; butit willvbe seen that in the almve-described improvement, the arrangemeuton the disk of both radial and transverse shafts,

revolving at different rates of speed, perm-its th'e suecessive use oftools very different in character and operation, so that operations canbe performed in one machine, and without removing the article operatedontha't could otherwise be effected only with two distinct and verydifferent machines, and by the transfer ofthe article from one to theother.` Without claiming, broadly, a revolving disk, carrying two ormore revolving cutters or tools,

I claim as my invention, and desire to secure by Letters Patent- 1.` Therevolving disk J, in combination with a. radial shaft, r, carrying adrill, on, a transverse shaft, p, carrying a milling-tool, n, and'withthe shaft ,1-I, cogwheels (I, f, and q, and bevel-gear s', or equivalentdevices for operating the shafts, substantially as described.

2. The combination of the revolving disk J, its shafts p and H, and cogq, with the 'arms 't ,drivingpinion '0, wheel d, and pinion f, asspecified.

In testimony whereof, I have signed my name to this specification, inthe presence of two -subscribing witnesses.

JAMES WATSON.

Witnesses i E. H BAILEY, HARRY SMrrH.

